152 Annals of the South African Museum. 



This delicate species bears a certain resemblance to species in many 

 widely separated regions of the world, especially as regards the 

 arrangement of media and its branches the Uanda group (Hoi- 

 arctic), Gonomyia proximo., Brunetti (Oriental), and even to Ptilostena, 

 Bergroth (Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 575-578, 1913). 

 The last-named group is separated from Gonomyia because of its 

 arrow petiolate wings, the long Sc } and the peculiar shape of cell B a 

 of the wings ; G. spuria shows all of these characters except the last, 

 and it seems doubtful whether Ptilostena should receive more than 

 sub-generic rank. Edward's Thaumastoptera aldabrensis (Trans. Linn. 

 Soc. Lond., vol. 15, pt. 2, p. 205, pi. 10, fig. 10, 1912) is also a Gonomyia 

 that shows many characters in common with Ptilostena. It may here be 

 mentioned that the Teucholabis flavonotata, Edwards (loc. cit., pp. 205, 

 206, pi. X, fig. 11), from the Seychelles Islands is a Gonomyia, closely 

 resembling G. sulphurella, Osten Sacken (E. Nearctic). 



SUB-GEN. GONOMYELLA, sub-gen, u. 



Differs from Gonomyia, s.s., as follows : Wings with the subcosta 

 elongate, cell R. 2 very large; radial cross-vein present; cell 1st Mo 

 open by the atrophy of m or the outer deflection of M. A . 



Type of the sub-genus. Gonomyiaslossonae, Alexander (Neotropical). 



Besides the two Ethiopian species described in this paper, Gonomyia 

 velutina, Alexander (Peru) also belongs to this group. 



GrONOMYIA (GrONOMYELLA) NATALENSIS, sp. 11. 



Head light grey ; thorax grey with three brown stripes ; pleura 

 striped grey and pale yellow; abdominal tergites uniformly dark 

 brown ; wings with subcosta elongate, cross-vein r present and con- 

 nected with .&, + 3, cell 1st Mo open by the atrophy of the outer 

 deflection of M$. 



Female. Length about 6'6 mm. ; wing 6'2 mm. 



Eostrum short, black, with a sparse greyish bloom ; palpi black. 

 Antennae rather elongated for this sex, black, the first segment about 

 as long as the two following combined ; flagellar segments elongate- 

 oval with an abundant white pubescence. Head clear light grey, the 

 vertex with a faint suffusion of brown ; space between the eyes very 

 broad. 



Pronotum prominent, light grey, broadly darker medially, the 

 scutellum more pallid, brownish-yellow. Mesonotal praescutum light 

 grey with three dark brown stripes, the median stripe broadest, 

 ending just before the transverse suture ; pseudosutural foveae 

 prominent, elongate, subtriangular, shiny black ; tuberculate pits 



